How to measure AC Voltage using ZMPT101B AC Voltage Module and Arduino UNO

[@fenomatik99]

In your tutorial guide you said the following "For people out there that do not have the LCD Display Shield, you can manually offset by entering the offset value in the code and re-upload again. There are 2 offset values (voltageOffset1 & voltageOffset2) need to calibrate." what values do i need to hardcode in the sketch before and after turning off AC power supply ? Can you please explain this is very urgent.

[@mesquitamk1681]

cool very good one question it will change and show on the LCD from 0 to 250v

[@marcin00015]

is the polarity really required - can i switch live with neutral?

[@mateuszmazur1482]

Hello. Is there any way to measure up to 260VAC? 250 is just a little bit too small in my case. Any ideas?

[@HobbyHomeWorkshop]

Hi! Can you explain how to calibrate the circuit ? There are two variables, voltageOffset1 and voltageOffset2, which must be adjusted according to the value measured by the module (I do not connect the module to AC). What is the ratio between them? I can not make it.

[@nitinkumar29]

You can save calibration values in eeprom in the arduino and then you don't need to calibrate again if you turn off the arduino.

[@Alexander-ri1bp]

Crazy to use a 1000:1000 CT to measure voltage like this. If the balast resistor fails, you fry your circuits. You should safely step down the voltage using a proper voltage transformer.

[@mastiff1995]

Can you explain the calibration more? (no display) .. In serial monitor (with no power) it shows 85 volts.. how would you adjust Voltage offset 1 and 2 for that?

[@tubigkarat9456]

Will this still work if I use ESP32 instead of Arduino? I really hope you will answer my question.

[@solarduino1374]

Hi, this sensors operating voltage and output signal is 5V, if you want to use ESP32 which supply and measures only 3.3V, you need a step up converter to 5V (for power supply to the sensor) and a voltage splitter to step down output signal from 5V to 3.3V into the ESP32. Hope it explains.

[@tubigkarat9456]

@@solarduino1374 Thank you very much

[@muhdsybl]

can i use esp32 ??

[@AmeidaJoilson]

amigo. muito obrigado. seu foi unico codigo que funcionou para min.

[@stephanhintz2347]

wich kind of fuse did you use ? i didnt get you in your video and would appreciate help.

[@solarduino1374]

Hi, you can use any kind of fuse 1-6A based on your cable size. In the video I was using car fuse as an example (for safety purposes make sure the fuse & its housing supports 230Vac rating)

[@andreynavarro5516]

Hi, Can I use this module to read a analog signal that changes its amplitud and frequency? I am generating it with a induction machine.

[@solarduino1374]

Hi. I have Never tried that before. I expect it is not suitable due to this voltage measurement is for 250v rms ac, if used for analog voltage signal (example 0-5v), there is huge resolution losses and measurement may not accurate. I suggest you just get a step down transformer to step down the analog signal to acceptable range of your micro controller board.

[@jeriellopez4927]

Will this work for both lines hot ac?

[@solarduino1374]

Hi, this module only could support 250Vac. It is not recommended to measure between Phase wires.

[@manzoorkhan5246]

How we can use this voltage sensor in proteus?

[@omaral-gallab7735]

Hi , How to connect arduino with oscilloscope

[@samahtebbal5218]

can u give the code Arduino plaiz i need it know

[@frankkwofie5855]

please i need help, how do i contact you